Slate-dressing machine



(No Model.) 2 sheets-sheet 1.

. P. R. MARKS.

SLATE DRESSING MACHINE. No. 330,248. @LA Patented Nov. 10, 1885.

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(No Model.) Y 2 Sheets-Sheet 2.

PALMARES. SLATE DRESSING MACHINE.

N0. 330,248. Patented Nov. 10, 1885l WITJVESSES lNT/EJVTOR @y m@ @m E `./ltorneys N. mms. WMU-.WLM www, D. c

UNITED STATES PATENT OEEicE..

FRANCIS R. MARKS, OF ASHLAND, OHIO.

SLATE-DRESSI'NG MACHINE.

SPECIFICATION forming part of Letters Patent No. 330,248, dated November 10, 1885.

Application led January 23, 1885. Serial No. 153,741.

'To rif/ZZ whom it may concern,.-

Be it known that I, FRANCIS R. MARKsa citizen of the United States, residing at Ashland, in the county of Ashland and State of Ohio, have invented certain new and useful Improvements in Slate-Dressing Machines, of which the following is a specification, reference being had to the accompanying drawings.

This invention relates to certain improvements in machines for dressing and punching slates; and it has for its objects to provide improved means for gaging and adjusting the slate to be cut, and for adjusting the cutting and punching mechanism, as more fully hereinafter set forth, and also to provide an adjustable seat for the operator, as more fully hereinafter explained. These objects I attain by the means illustrated in the accompanying drawings, in whichj Figure l represents a plan View of my improved machine with a portion of the upper works removed to show the slate-adjusting devices. Fig. 2 represents a vertical sectional view of the machine. Fig. 3 indicates a top View of the vibrating arm which carries the cutting and punching mechanism. Fig. 4 represents a front view of the machine; Fig. 5, a detached view of the punch-gage; Fig. 6, a detached view of a portion of the adjustable seat; Fig. 7, a detached view of one of the slate-supports which set below the punches, and Fig. 8 indicates a detached view of a portion of theseat-support.

The letter A indicates the frame of the machine, which is provided with a central crossrail, B, at the top, which is T-shaped in crosssection, and has adjustably secured to it a slide, O, provided with a clamping-screw, D, by which it may be held in any desired adjusted position.

The letter E indicates the slate-rests, which are secured by means of the bolts F to the slide G. The rests are arranged to turn upon the bolts F, and are held in an adjusted inclining position by means of the ratcheted or serrated seats G', which engage the similarlyratcheted bases of the slate-rests, as shown in Fig. 1 of the drawings. The slate-rests are connected by means of the pivoted links H with the slide C, so that the slate-rests may be Simultaneously adj usted at the same angle at (No model.)

each side of the central rail, B,without calculation.

The letter I indicates an adjustable gage, which may be adjusted by means of a setscrew, M, to determine the length of the slate to be cut, the rear end of the slate resting against the rear upward portion of the gage.

The letter N indicates a lever fulcrumed in bearings P at the rear of the machine, the fulcrum-bolt being surrounded by a spiral spring, Q, which holds the knife-arm R normally elevated, the said arm being connected with a treadle, S, by means of which it may be depressed by the foot of the operator to operate the knives and punches for punching and trimming the slate. The knives are mounted on the slides S', which are adjustably secured to the beveled cross-bar-T of the vibrating arm in such manner that they may be separated to adj ust laterally, and also turned so as to adjust them at angle to each other.

The forward top rail, U, of the frame is beveled in cross-section, and provided with adjustable slides V,which carry the adjustable punch-rests V, the vibrating arm above being provided with a cross-slotted arm, K', having graduations at each side, and carrying the punches Z for piercing the slate. Ic` the front of the frame A is pivoted a frame, A', which has secured to it a half-frame, B', provided with semicircular recesses C', and to said halfframe is hinged a similar frame, D', which is adjustably connected to the frame B' at one end by means of the bolt and set-screw E'. The half-frame B' has secured to it a seat, F', which may be adjusted to and from the machine by setting it back and forth by the adjustment of the half-frame, so as to cause the successive recesses to embrace the front rail frame A are provided with rubber stops I for the frame K', carrying the slate-punches, to limit their movement.

In operation the slate is adjusted between the slate-rests, and upon the front supports the rests as Well as the knives to cut the slates IOO to the proper shape, while .the punches and to the adjustable gage by means of pivoted front rests are adjusted to pierce the slate at rods, the rateheted or serratedseats whereby the proper points. the rests may be held, and the clamping-bolts 15 The slate-rests E may be either ratcheted or whereby the parts may be securely clamped 5 plain, and the slide C and links H may be together, substantially as specified.

omitted, if desired,with out changing the spirit In testimony whereof I affix my signature Ain of my invention. presence of two witnesses. v

Having thus described my invention, what I claim, and desire to secure by Letters Patent, FRANCIS R' MARKS' 1o isl Witnesses:

In combination with the rests adapted to F. C. SEMPLE,

hold the slate, the adjusting-slides*connected E. N. HARVARD. 

